Allow the creation of extra manifests via values

Signed-off-by: Guillaume Plessis <gui@endor.ai>

deploy/charts/cert-manager/templates/extras-manifests.yaml

@@ -0,0 +1,4 @@
+{{ range .Values.extraObjects }}
+---
+{{ tpl (toYaml .) $ }}
+{{ end }}

deploy/charts/cert-manager/values.yaml

@@ -1308,3 +1308,20 @@ startupapicheck:
   # injected into pod's environment variables, matching the syntax of Docker
   # links.
   enableServiceLinks: false
+
+# Create a dynamic manifests via values:
+extraObjects: []
+  # - apiVersion: cert-manager.io/v1
+  #   kind: ClusterIssuer
+  #   metadata:
+  #     name: letsencrypt-prod
+  #   spec:
+  #     acme:
+  #       email: foo@bar.com
+  #       server: https://acme-v02.api.letsencrypt.org/directory
+  #       privateKeySecretRef:
+  #         name: letsencrypt-prod
+  #       solvers:
+  #         - http01:
+  #             ingress:
+  #               class: nginx